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CÁC THÌ CƠ BẢN TRONG TIẾNG ANH

2015-10-10 10:54
  1.1 Simple Present (thời hiện tại thường) Dùng để diễn đạt một hành động mang tính thường xuyên (regular action), theo thói quen (habitual action) hoặc hành động lặp đi lặp lại có tính qui luật.         I walk to school every day.  Khi chia động từ...
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3000 câu giao tiếp Tiếng Anh (Tuần 1+2)

2015-10-10 10:50
DAY 1: 1. Do you know why I didn't show up last night? 2. I tried to call you but I got a busy signal. 3. I was in a hurry so I couldn't text you. 4. My friend came and I had to take her out for dinner. 5. I intended to call you back but it just slipped my mind afterwards.   DAY 2 6.  I...
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BÀI TẬP ADN, ARN VÀ PROTEIN

2015-10-10 10:46
PHẦN BÀI TẬP ADN *********************   Bài 1: Cho biết một phân tử ADN, số nucleotit (nu) loại A bằng 100000 nu chiếm 20% tổng số nucleotit.             a. Tính số nucleotit thuộc các loại T, G,...
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BÀI TẬP TRẮC NGHIỆM CHƯƠNG II_BẢNG TUẦN HOÀN VÀ ĐỊNH LUẬT TUẦN HOÀN

2015-10-10 10:43
BẢNG TUẦN HOÀN VÀ ĐỊNH LUẬT TUẦN HOÀN Câu 0. Hòa tan hoàn toàn 0,3 gam hỗn hợp hai kim loại  X và Y ở hai chu kì liên tiếp của nhóm IA vào nước thì thu được 0,224 lít khí hiđro ở đktc. X và Y là những nguyên tố hóa học nào sau đây?          ...
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Bài tập chương II Hóa 10_BẢNG TUẦN HOÀN

2015-10-10 10:42
1)      Cho Al (Z=13), P (Z=15), Ca (Z=20), Na ( Z=11), Mg (Z=12), Si (Z=14), S (Z=16), Cl (Z=17), Ar (Z=18), Ne (Z=10), K (Z=19), O (Z=8), C (Z=6), N (Z=7), F (Z=9), Li (Z=3), He (Z=4), B (Z=5) a)      Hãy viết cấu hình e nguyên tử rồi cho biết số...
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